Without giving any kind of exact specifics (you should know better Jet Cash... hahahahaha ), I am not even going to attempt to compete with you on age, so in that sense you got me beat by a generation.. and so surely, in some  sense you are very lucky to have lived to a ripe ole age, and surely you start to consider your mortality more and more as you get older, perhaps some age-related issues come along, and likely you begin to witness more and more people who are your age or younger passing on.

In late 2013, when I first got into bitcoin I was thinking about bitcoin as a 1-2 year investment minimum, but then surely willing to consider the possibility of investing on a longer timeline 4-5 years, or even more than 10 years, but those longer timelines would be contingent on BTC performance as compared with other assets, and perhaps other ongoing fundamentals, including factors related to my own self that might change with the passage of time, such as cashflow, risk tolerance, time and abilities to manage, plan and reallocate and trade.

Probably in the past year or maybe a bit longer, I have rethought the blanket recommendations that I have been giving to anyone who ask me about whether they should invest in bitcoin or get involved in bitcoin.

Currently, my blanket recommendation would be to invest 1% to 10% of your investable quasi-liquid assets into bitcoin, so long as you perceive your investment timeline to be a minimum of 4-5 years, and if your minimum investment timeline is  between 1-4 years, then I would recommend 1-2% of your investable quasi-liquid assets into bitcoin.  If your timeline is less than 1 year, I would recommend NOT investing anything into bitcoin (except to the extent that you perceive yourself as a gambler).

So, getting back to age, anyone who starts to get into their more elderly years, should be more seriously considering their actual timeline, and whether they have any health issues that might cause them to have shorter timeline expectations, and of course, health issues could come at any time, but getting into your 70s, by itself, becomes a factor by itself, even if you have not experienced any previous significant or meaningful health factors that are personally affecting you.

Anyhow, I will repeat my congratulations that you have reached your later 70s, and since you did not mention anything even generally regarding your health, I am going to presume (I have not yet read through the thread posts) that there was not necessarily anything that you thought would be relevant to this particular topic to bring up in OP, which seems to be a positive revelation, in and of itself.

By the way, (since the forum has been around for more than 10 years), I would bet that there have to be a decent number of forum members, who are more elderly than you, and of course, when anyone invests into bitcoin (and I don't really care to account for the considerations of the shitcoin investors) at such age they either may have had a longer term investment thesis and just gotten older along the way or maybe they were investing for a shorter-term and then just transitioned into a longer-term investor.  Surely, the younger investors are going to consider some of the timeline matters, differently, and more elderly investors would be more likely to be considering either moderate investing into BTC or even cashing out strategies, whether incrementally or lump sums.